The authors examined situational and affective risk factors associated
with the use of alcohol and other drugs. Five primary substance group
s (alcohol, cocaine, marijuana, sedatives-tranquilizers, and heroin-op
iates) were compared on situational risk scales from the Inventory of
Drinking and Drug Use Situations. Significant differences were found b
etween groups on both level and pattern of situational and affective r
isk. Positive social experiences and negative affective states were im
portant risk factors for the alcohol and cocaine groups. Positive affe
ctive and situational factors were important for the marijuana group.
Negative physical states and interpersonal conflict were important ris
k factor for the heroin-opiate and sedative-tranquilizer groups. Age a
nd gender were also found to be significantly related to level and pat
tern of situational risk for alcohol and other drug use.